Cylinder for treating heated metal.



" v No. 834,356. PATENTED OCT. 30 1906.

" WITNESSES: I

V FiG-rl O? I i;

INVENTOR ing is a specification.

UNITED STATES PATENT o FIoE.

GEORGE H. BENJAMIN,

OF NEW YORK, N; Y., ASSIGNOR TO THE OOE BRASS MANUFACTURING COMPANY, A CORPORATION OF (JON N EOTIOUT.

Specification of Iietters Patent.

Patented Oct. 1906.

Application filed May 19,1905'. Serial No. 261,177.

To all whom it may concern:

Be it known that I, GEORGE H. BENJA- MIN, a citizen of the United States, residing at New York, county of New York, State of New York, have invented a Cylinder for Treating Heated Metal, of which the follow- My invention relates generallyto a paratus such as is ordinarily employed in t e extrusion process of manufacturing solid or hollow Wire, rods, bars, and the like. The invention has particular reference tothe construction of the pressure chamber or container forming part of such apparatus, which serves to hold the body of heated metal while it is being acted'upon by hydraulic or other pressureemployed to force the same through a die. 1 i I The accompanying drawings illustrate a container suitable for carrying my invention into effect. I wish it understood, however,

that I do not limit myself to the particular construction shown, as various changes may be madetherein or other forms employed operating in substantially the same manner to V produce practically the same result.

at the ends and of a In the drawings,Figure 1 1s a sectional. view taken on the line 8 s of Fig. 2, showing a container constructed in accordance with my invention, also a hydraulic accumulatorpump employed to compress the body of granular material contained between the inn'er and outercylindricall shells; and Fig. 2 is a similar view, taken on the line 8 s of Fig. 1, with the pump removed.

Referring now to the drawings, the con-- tainer shown is made u of a cylinder 1 open iameter suitable for providin interiorly thereof a chamber 2 to receive t e metal to be actedupon. Such metal is placed in the chamber 2 in a highlyquantity' to produce a rod, bar, or tube of desired dimensions when subjected to hydraulic or other pressure applied by means of a iston 3, actmg to force the same from t e container through a die 4, as shown in Fig. 2.

Owing to the high temperature and pressure to which the cylinder is subjected in use,

the containing-cylinder. For this urposeI employ a jacket or housing 5, pre erablv of cast-steel, which is fitted upon the ends of the cylinder 1 and hollowed out interiorly to form a closed annular chamber 6, extending throughout the greater portion-of the length thereof.

The chamber is filled with a body of closely-packed or finely-divided granular material 7 or other mobile body, preferably glass-sand, which when subjected to pressure applied from without the chamber will take the form of the chamber and transmit the applied pressure in all directions. bile body may be introduced by means of a passage 8, controlled by a screw-plug or other form of valve 9. In order that the mobile filling, may be effective as a protective covering for the cylinder, I propose to com ress it in thechamber 6 under a pressure at Such mo east equal to the lateral pressure developed within the cylinder 1 when the apparatus is in use. This may be accomplished in various ways; but for convenience of illustration I have shown a hydraulic accumulator-pump 10 of the hand-operated type as a means of generating the required pressure. The pump 10 is threaded in the outer end of the valved passage 8 and is rovided with a handle 11, by which it may e operated to force water or other liquid into a chamber 12, containing a movable piston 13. The piston 13 acts between the body of sand or'like material on one side, forming the filling 7, and a trapped body of-water 14 on the other side thereof, and when, therefore, the valve 9 is open and the pump is operated the resulting increase in the body of water above the piston causes the latter to exert pressure upon the sand or other material in the chamber 6 until the desired degree of compression is obtained. When this is accomplished, thevalve 9 is closed, and the pump may be disconnected and a screwlug 15 substituted therefor as an additiona closure for the passage 8, as shown in Fig. 2, or by employing the pump or other source of power while the container is in use uniform or continuous pressure may be maintained in the chamber 6.

The various advantages of my invention will be apparent from the foregoing description, as will also the use of the container, which, as above stated, forms part of the usual apparatus employed in carrying out the Well-known extrusion process of shaping metal.

Having thus described my invention, I claim 1. A container for treating heated metal under pressure comprising, a cylinder, means forming a chamber around the cylinder, and a uniformly mobile mass of matter under a sustaining pressure filling the chamber.

2. A container for treating heated metal under pressure comprising a cylinder, means forming a chamber around the cylinder, a compact mass of finely-divided material filling the chamber, fluid-pressure-generating means, and requisite connections between the latter and said chamber.

3. A container for treating heated metal under pressure comprising an inner cylinder, an outer cylinder fitted thereon and recessed throughout its inner periphery to form a closed annular chamber, a inass of granular material filling the chamber, and fluid-pressure-generating means cooperating to compress the material in the chamber.

4. A container for treating heated metal under pressure comprising, a cylinder,.means forming a chamber around the cylinder, a mobile mass of granular'solid matter filling the chamber, and means for exerting pres sure upon said mobile body.

5. A container for treating heated metal under pressure comprising a cylinder, a covering for the cylinder consisting of a mobile mass of solid matter, means for retaining said mass in compact confinement, means for subjecting the covering to an interior pressure, and means for varying such pressure in accordance with variations in the pressure developed within the cylinder.

'6. A container for treating heated metal under pressure comprising, a cylinder, means forming a chamber around the cylinder, a mobile mass of granular material filling the chamber, and means external to the container for subjecting the mobile mass to pressure.

7. A container for treating heated metal under pressure comprising a cylinder, means forming a chamber around the cylinder, means for forcing granular material into the chamber under pressure, and means independent of said last-mentioned means for closing the chamber, with the contents thereof under a sustaining pressure.

8. A container for treating heated metal under pressure comprising a cylinder, means forming a-closed chamber around the cylinder, a body of finely-divided material filling the chamber, and a valved passage leading from the same.

9. A container for treating heated metal under pressure comprising a cylinder, means forming a closed chamber around the cylinder with a valved passage leading therefrom, a mass of finely-divided material, and means for forcing such material through said passage and compressing it in the chamber.

10. A container for treating heated metal under pressure comprising, a cylinder, a mobile covering of solid matter for said cylinder, means for confining said mobile covering, and means for subjecting said mobile covering to pressure.

11. A container for treating heated metal under pressure comprising, a cylinder, a chamber surrounding said cylinder, a mobile mass of solid matter in said chamber, and means for exerting exterior pressure upon said mobile body and transmitting said pressure through said mobile body to the walls of the chamber.

In testimony whereof I aflix my signature in the presence of two witnesses.

GEORGE H. BENJAMIN.

Witnesses:

FRANK O'CONNOR, M. G. CRAWFORD. 

